It's ok, we actually don't need to interview you

Yesterday my coworker was making calls to set up interviews for 3 of the open positions we have.

This particular guy's went like this after the initial small talk:

Coworker: So would you like to come in for an interview? You can come between 8 AM and 4 PM.

Applicant: Can I come in at 5:30?

Coworker: The times are 8 to 4, 4:30 at the latest

Applicant: Can I come in at 7?

My coworker was exasperated at this point. The guy finally agreed to come interview during the available times, but it's a waste of his time and ours. He's not the one.